#040639#040639

#040639 is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.4% C 0.095 H 268.9°. Best body text is #FFFFFF at 19.26:1 contrast (WCAG AA passes).

Color values

HEX	#040639
RGB	rgb(4, 6, 57)
HSL	hsl(238, 87%, 12%)
HSV	hsv(238, 93%, 22%)
CMYK	cmyk(93%, 89.5%, 0%, 77.6%)
CIE-LAB	lab(4.08, 17.39, -31.38)
CIE-LCH	lch(4.08, 35.87, 298.99°)
OKLab	oklab(17.43% -0.0018 -0.0954)
OKLCH	oklch(17.43% 0.095 268.9)
XYZ	xyz(0.8535, 0.4514, 3.9122)
Luminance	0.0045 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040639 #393704

analogous

#042139 #040639 #1D0439

triadic

#040639 #390406 #063904

tetradic

#040639 #390421 #393704 #04391D

square

#040639 #390421 #393704 #04391D

split-complementary

#040639 #391D04 #213904

monochromatic

#02031D #02031D #040639 #080C72 #0C12AB

Accessibility & contrast

On white

19.26

#040639 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#040639 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040639

19.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040639	#FFFFFF	#000000	##FFFFFF
##040639	1.00	19.26	1.09	19.26
#FFFFFF	19.26	1.00	21.00	1.00
#000000	1.09	21.00	1.00	21.00
##FFFFFF	19.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00113A

Deuteranopia (green-blind)

#000B38

Tritanopia (blue-blind)

#00151F

Achromatopsia (no color)

#0E0E0E

Design tokens & code

CSS

--color: #040639;
/* rgb */ color: rgb(4, 6, 57);
/* oklch */ color: oklch(17.4% 0.095 268.9);

Tailwind

colors: {
  custom: {
    50: '#4e4870',
    500: '#040639',
    950: '#000000',
  },
}

SCSS

$custom: #040639;
$custom-light: #4e4870;
$custom-dark: #000000;

JSON

{
  "hex": "#040639",
  "rgb": {
    "r": 4,
    "g": 6,
    "b": 57
  },
  "hsl": {
    "h": 237.736,
    "s": 86.885,
    "l": 11.961
  },
  "oklch": {
    "l": 0.17432,
    "c": 0.09546,
    "h": 268.9
  },
  "luminance": 0.00451
}

Semantic roles & 50–950 ramp

primary

#040639

secondary

#7B771E

accent

#F52BFD

background

#F4F4F6

surface

#E7E6EC

border

#C3C2C7

text

#020007

muted

#78777A

Preview Lab

Preview with #040639

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →